研究目的
To propose a novel low-profile single-fed circularly polarised single-layer metasurface antenna for wideband operation.
研究成果
The proposed single-layer metasurface antenna achieves good impedance bandwidth and wideband 3 dB AR bandwidth, making it a suitable candidate for single-fed low-profile CP antenna applications. The design is easy to fabricate and offers a compact solution for wideband circularly polarised radiation.
研究不足
The study focuses on a specific design and may not cover all potential variations or applications. The performance is evaluated under specific conditions, and real-world applications may present additional challenges.
1：Experimental Design and Method Selection:
The design involves a single-layer metasurface antenna with nine unit cells arranged in a 3 × 3 layout, incorporating four slits and a modified L-type slot for circular polarisation and bandwidth improvement.
2：Sample Selection and Data Sources:
A prototype was fabricated and measured.
3：List of Experimental Equipment and Materials:
A 2 mm thick F4BM350 substrate (?r =
4：5 and tan δ = 001) was used, along with a coaxial probe feed. Experimental Procedures and Operational Workflow:
The antenna's performance was evaluated through simulation and measurement, including return loss, gain, axial ratio, and radiation patterns.
5：Data Analysis Methods:
The return loss was simulated by AnsysEM18.2 and measured using the Agilent E8363B vector network analyser. Gain, AR, and radiation patterns were measured using the NSI far-field measurement system.
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